Azo coloring-matter.



r blue to black fast the new dyestuffs with stannous chlorid and diamino4 chloroenol and ,2-11rylamino-5maphthol-(S-ami UNITED SlAlTES PATENT()FETICE.

MYRTIL KAHN, or ELBERFELD, ax

GERMANY,

00., OF ELBERFELI), GERMANY,

ASSIGNORS 'lO l ARBFNFABRlKEN YORM. FRHCUR. BAYER &

A ()()Rl.()RXll()\ ()l GERMANY.

AZO COLORING-MATTER.

Specifica ion of Letters Patent.

Patented Feb. 5, 1907.

Application filed November 6,1906. Serial No. 342.286.

To all whom it may calmer-rt: 7 Be it known that we, ivlriu'rn. RICHARDKo'rnn,

new and useful fication.

nophenol with sulfonic acids.

The new dyestufi's are in the shape of their alkaline salts dark powderssoluble in water with a violet color, and

shades, h 1

s ac cs.

11 drochloric acid 26 p no-7-sulfon1c aclds are obtained.

call we can proceed as follows,

ing y weight: 18.9 parts of 6-nitro-4-chloro- Q-annnophenol arediazotized in the usual way 3 parts of 2-phenylaminofonic acid dissolvedin an excess carbonate solution. completely after a short time. off anddried. pulverized, in the shape of dark powder soluble in water with a vcolor and in concentrated sulfuric acid with uction with. stan-Z-(i-dia- 4o iiiino-4-chlorophenol and 'Z-phenylamino-5- ob- The newdyestu'll' dyes wool l'rom which are changed By red hydrochloric acid abluish-red color. nous chlorid and naphthol-6-annno7-sulfonic acid 1stained. acid baths violet shades, to blue when chromed al'ter dyeing. 3The process thoi-T-sull'onic acids, such anislainino-5naphtholJ-siillonic 5" the ikc.

Kanx and j citizens of the Germany Empire, residing at respectively,Elberield K 5 and Vohwinkel, near Elberl'eld, in the Kingdom of Prussia,Germany, have invented Improvements in Azo Coloring-Matters, of whichthe following is a speci- We have found that new and valuable azodyestuffs are obtained by combining the diazo compound of6nitro-4-chloro2ami- 2-arylaniino-5-naphthol-7- dyeing wool from acidbaths, generally from red to violet which, on chroming, change to fromBy reduction of In carrying out the new process practithe parts beandthen combined with. tl1irt \;'t\\o S-mrphthol-T-sul- 1 of a sodium i Thed yestufl' separates it is [ill-cred It is, after being dried and 3 itssodium salt a iolet is carried out in an analogous manner on using otherZ-arylamino-S-naphas 2paratolyla|nin0 5-11aphtholfl-sulhmic acid,'l-orthoacid, or

E, The dyestu'll' 0btained----c. from the diazo compound ol" ii-nitrr--l-chloro-Q-arninophenol and 2 paratolylamino 5 naphthob 7-sullonicacid 'dyes wool violet, turning to blue by treatment with chromium conepounds.

llaving now described in what manner the same 1 what we claim as new,and desire to secure by Letters Patent, isl 1. The herein-described newazo dyestuil's lobtainable by combining the diazo compound of6--nitro4-ehloro-Z-arninophenol l with .2 arylamino- 5- naphthol-7-sullonic acids, which dyestull's are, after being dried l andpulverized, in the shape of their alkaline i salts dark powders solublein water; yielding l upon reduction with stannous chlorid and h\'drochloric acid, 2-6-diamino-sL-chlorol phenol and.Z-arylaniino5naphthol-(i-aminol T-sullonic acid and dyeing, wool fromacid l baths generally from red to violet shades, l l l l l l ourinvention and 1s to be performed,

which on chroming change to from blue to black shades, substantially ashcreinbefoic described.

2. The herein-described new azo dyestu'll, which can be obtained bycombining diazotized 6-intro-4chloro-2-aminophenol 5 with'l-phenylaminonaphtl'iol-T -sull"onic 'al'ter being dried and acid,which. dyestufi' is,

its sodium salt a pulverized, in the shape of 1 dark powder soluble inwater with a violet color and in concentrated sulfuric acid with 1 abluish-red color; yielding upon reduction 1 with stannous chlorid andhydrochloric acid i Z-l'Hlialni|n)4-chlor )phenol and Z-phenyl amiin5-na1 htlrol-(i-aniino--7sull'onic' acid; l and dyeing wool from acidbaths violet lshades, which are changed to blue when l chromed afterdyeing, substantially as hereinbel'ore described.

in testimony whereof we have hereunto set our hands in the presence oftwo sub-- scribing witnesses.

i MYR'lll, KAllN.

y RRHARI) .KO'llllG. i Witnesses:

l U'r'i'o Komu,

l J. A. Rrernnsnaus,

